<template>
  <div>
    <section class="msite">
      <!--首页头部-->
      <HeaderTop :title="address.name">
        <span class="header_search" slot="left">
          <i class="iconfont icon-sousuo"></i>
        </span>
        <span class="header_login" slot="right">
          <span class="header_login_text">登录|注册</span>
        </span>
      </HeaderTop>
      <!--首页导航-->
      <nav class="msite_nav">
        <div class="swiper-container">
          <div class="swiper-wrapper">
            <div
              class="swiper-slide"
              v-for="(categorys, index) in categoryArr"
              :key="index"
            >
              <a
                href="javascript:"
                class="link_to_food"
                v-for="(category, index) in categorys"
                :key="index"
              >
                <div class="food_container">
                  <img :src="baseImageUrl + category.image_url" />
                </div>
                <span>{{ category.title }}</span>
              </a>
            </div>
          </div>
          <!-- Add Pagination -->
          <div class="swiper-pagination"></div>
        </div>
      </nav>
      <!--首页附近商家-->
      <div class="msite_shop_list">
        <div class="shop_header">
          <i class="iconfont icon-xuanxiang"></i>
          <span class="shop_header_title">附近商家</span>
        </div>
        <ShopList />
      </div>
    </section>
  </div>
</template>

<script>
import Swiper from "swiper";
import "swiper/dist/css/swiper.min.css";

import HeaderTop from "../../components/HeaderTop/HeaderTop.vue";
import ShopList from "../../components/ShopList/ShopList.vue";
import { mapState } from "vuex";

export default {
  data() {
    return {
      baseImageUrl: "https://fuss10.elemecdn.com",
    };
  },
  computed: {
    ...mapState(["address", "categorys"]),
    /**
     * 根据categorys一维数组生成一个二维数组
     * 小数组中的元素个数最大是八
     */
    categoryArr() {
      const { categorys } = this;
      const arr = [];
      let minArr = [];
      //#region 老师的方法
      //   categorys.forEach((c) => {

      //     if(minArr.length === 8){
      //       minArr = [];
      //     }
      //     if(minArr.length === 0){
      //       arr.push(minArr);
      //     }
      //     minArr.push(c);

      //   });
      //#endregion
      for (let i = 0; i < categorys.length; i++) {
        const element = categorys[i];
        minArr.push(element);
        if (minArr.length === 8 || i == categorys.length - 1) {
          arr.push(minArr);
          minArr = [];
        }
      }
      return arr;
    },
  },
  watch: {
    categorys(value) {
      this.$nextTick(() => {
        new Swiper(".swiper-container", {
          loop: true, //可以循环播放
          //如果需要分页器
          pagination: {
            el: ".swiper-pagination",
          },
        });
      });
    },
  },
  mounted() {
    this.$store.dispatch("getCategorys");
    this.$store.dispatch("getShops");
  },
  components: {
    HeaderTop,
    ShopList,
  },
};
</script>

<style lang="stylus" rel="stylesheet/stylus">
@import '../../common/stylus/mixins.styl'

.msite // 首页
  width 100%
  .msite_nav
    bottom-border-1px(#e4e4e4)
    margin-top 45px
    height 200px
    background #fff
    .swiper-container
      width 100%
      height 100%
      .swiper-wrapper
        width 100%
        height 100%
        .swiper-slide
          display flex
          justify-content center
          align-items flex-start
          flex-wrap wrap
          .link_to_food
            width 25%
            .food_container
              display block
              width 100%
              text-align center
              padding-bottom 10px
              font-size 0
              img
                display inline-block
                width 50px
                height 50px
            span
              display block
              width 100%
              text-align center
              font-size 13px
              color #666
      .swiper-pagination
        >span.swiper-pagination-bullet-active
          background #02a774
  .msite_shop_list
    top-border-1px(#e4e4e4)
    margin-top 10px
    background #fff
    .shop_header
      padding 10px 10px 0
      .shop_icon
        margin-left 5px
        color #999
      .shop_header_title
        color #999
        font-size 14px
        line-height 20px
</style>